GB1351888A - Access control system - Google Patents

Access control system

Info

Publication number
GB1351888A
GB1351888A GB650072A GB650072A GB1351888A GB 1351888 A GB1351888 A GB 1351888A GB 650072 A GB650072 A GB 650072A GB 650072 A GB650072 A GB 650072A GB 1351888 A GB1351888 A GB 1351888A
Authority
GB
United Kingdom
Prior art keywords
key
memory
gate
card
reading
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB650072A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1351888A publication Critical patent/GB1351888A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
    • E05B49/002—Keys with mechanical characteristics, e.g. notches, perforations, opaque marks
    • E05B49/006—Keys with mechanical characteristics, e.g. notches, perforations, opaque marks actuating opto-electronic devices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/01—Details
    • G06K7/016—Synchronisation of sensing process
    • G06K7/0166—Synchronisation of sensing process by means of clock-signals derived from the code marks, e.g. self-clocking code
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/215—Individual registration on entry or exit involving the use of a pass the system having a variable access-code, e.g. varied as a function of time
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/26—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being duration, interval, position, frequency, or sequence

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Lock And Its Accessories (AREA)
GB650072A 1971-03-19 1972-02-11 Access control system Expired GB1351888A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12621371A 1971-03-19 1971-03-19

Publications (1)

Publication Number Publication Date
GB1351888A true GB1351888A (en) 1974-05-01

Family

ID=22423614

Family Applications (1)

Application Number Title Priority Date Filing Date
GB650072A Expired GB1351888A (en) 1971-03-19 1972-02-11 Access control system

Country Status (5)

Country Link
US (1) US3700859A (enrdf_load_stackoverflow)
BE (1) BE780891A (enrdf_load_stackoverflow)
DE (1) DE2212519A1 (enrdf_load_stackoverflow)
FR (2) FR2129800A5 (enrdf_load_stackoverflow)
GB (1) GB1351888A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196347A (en) 1978-07-10 1980-04-01 Chubb & Son's Lock And Safe Company Limited Security systems
GB2158911A (en) * 1984-05-05 1985-11-20 Unimax Switch Ltd Machinery security systems
DE3616019A1 (de) * 1986-05-13 1987-11-19 Jaufmann Ingrid Warnanlage zum sichern eines innenraumes

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829833A (en) * 1972-10-24 1974-08-13 Information Identification Co Code element identification method and apparatus
US3984658A (en) * 1975-09-26 1976-10-05 Cannon John W Programmable card actuated lock
US4086475A (en) * 1976-08-31 1978-04-25 Churchill William M Ticket taking system
US4074852A (en) * 1976-12-06 1978-02-21 Ncr Corporation Symbol decoding method and means
GB1584343A (en) * 1977-06-07 1981-02-11 Tokyo Shibaura Electric Co Apparatus for marking identification symbols on wafer
US4415893A (en) * 1978-06-27 1983-11-15 All-Lock Electronics, Inc. Door control system
DE2933764C2 (de) * 1979-08-21 1985-02-14 Hermann 7742 St Georgen Stockburger Verfahren und Einrichtung zum Verschlüsseln bzw. Entschlüsseln und Sichern von Daten
EP0034230A1 (en) * 1980-02-19 1981-08-26 Jerome Hal Lemelson Switch and lock activating system and method
JP2008027558A (ja) * 2006-07-25 2008-02-07 Hitachi Global Storage Technologies Netherlands Bv データ記録装置、記録媒体、およびエラー検出方法
US10400475B2 (en) 2015-12-01 2019-09-03 Schlage Lock Company Llc Systems and methods for key recognition

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3510780A (en) * 1966-09-12 1970-05-05 Motorola Inc Two-state communication devices having combined clock and information signals
US3588449A (en) * 1967-04-11 1971-06-28 Rca Corp Electronic check-cashing system
US3602695A (en) * 1967-06-19 1971-08-31 Docutel Inc Document-coding method and apparatus
US3519989A (en) * 1967-07-24 1970-07-07 Smith Corp A O Multiple code reader system for automatic control of controlled devices
US3601805A (en) * 1967-12-22 1971-08-24 Res Systems Corp Credit card verifier apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196347A (en) 1978-07-10 1980-04-01 Chubb & Son's Lock And Safe Company Limited Security systems
GB2158911A (en) * 1984-05-05 1985-11-20 Unimax Switch Ltd Machinery security systems
DE3616019A1 (de) * 1986-05-13 1987-11-19 Jaufmann Ingrid Warnanlage zum sichern eines innenraumes

Also Published As

Publication number Publication date
FR2130519A1 (enrdf_load_stackoverflow) 1972-11-03
FR2129800A5 (enrdf_load_stackoverflow) 1972-10-27
US3700859A (en) 1972-10-24
BE780891A (fr) 1972-07-17
FR2130519B1 (enrdf_load_stackoverflow) 1974-08-02
DE2212519A1 (de) 1972-12-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee